Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem eram os oponentes em 27 de janeiro?
 ###Tabelas: CREATE TABLE world_championship_group_c_france (world_championship_group_c_france_id AUTO_INCREMENT PRIMARY KEY, Games INT, Drawn INT, Lost INT, Points difference VARCHAR, Points INT) CREATE TABLE schedule_and_results (schedule_and_results_id AUTO_INCREMENT PRIMARY KEY, Game INT, January INT, Opponent VARCHAR, Score VARCHAR, Record VARCHAR) CREATE TABLE doubles_runner-up (doubles_runner-up_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score VARCHAR) CREATE TABLE points_system (points_system_id AUTO_INCREMENT PRIMARY KEY, Distance VARCHAR, 10th INT, 11th INT, 12th INT, 13th INT, 14th INT, 15th INT, 16th INT, 17th INT, 18th INT, 19th INT, 20th INT, 21st INT, 22nd INT, 23rd INT, 24th INT, 25th INT, 26th INT, 27th INT, 28th INT, 29th INT, 30th INT, 31st INT, 32nd INT) CREATE TABLE 2011_ladder (2011_ladder_id AUTO_INCREMENT PRIMARY KEY, South West DFL VARCHAR, Wins INT, Byes INT, Losses INT, Draws INT, Against INT)  
SELECT Opponent FROM schedule_and_results WHERE January = 27